Get a 360-degree view of different types of pavement management systems and how public agencies utilize them to keep track of pavement inventory, condition and scheduled maintenance. A top official from Los Angeles County gives her perspective on the program.

1. LOS ANGELES COUNTY’S
PAVEMENT MANAGEMENT SYSTEM
STANTEC ROADMATRIX
Network Level Approach To Managing County Roads
Presented by: IMELDA DIAZ, PE,APM, MS
Geotechnical & Materials Engineering Division - Pavement Management Unit
April 15, 2015

2. LOS ANGELES COUNTY
UNINCORPORATED AREA ROAD NETWORK
• 3,300 Lane Miles
MAJORS
• 4,000 Lane Miles
LOCALS
TOTAL: 7,300 LANE
MILES
(576M SF or 64M SY)

3. NORTH COUNTY NETWORK
51% of Network
57% Rural - 2 lanes
Low to ModerateTraffic
No Curb and Gutter
ExtremeTemp. Fluctuations

4. 49% of Network
92% Urban – 4 to 7 lanes
Moderate - High traffic
Commercial / Residential
SOUTH COUNTY
(LA BASIN)
NETWORK

5. LA County’s Pavement Management System
StantecRoadMatrix
Application Version 3.3
4th generation PMS
Oracle database
platform

7. The County’s Sustainable Approach
1. Take care of our good roads first
2. Use recycled materials in pavement
treatments
3. Reutilize existing materials in-place

8. Typical Pavement Performance Curve
Preservation ($0.20-$1.25/sf)
Resurface ($1.75-$2.50/sf)
Major Rehabilitation ($3-$5/sf)
Reconstruction ($6-$12/sf)

9. Pavement Performance Prediction Curves
PavementConditionIndex
(PCI)
100
80
60
40
20
Thick Pavement
Low Traffic
Strong Subgrade
Thin Pavement
High Traffic
Weak Subgrade

10. Decision Tree Analysis
What are the possible
treatment alternatives?

11. Location and Environment
• Coastal, inland valley, or
mountain
• Urban or rural
• Zoning
• Traffic type
Pavement History
• Past treatments
• Surface condition
• Geometrics
Parkway Condition
• Curb and gutter
• Sidewalk
• Drainage
• Tree roots
• Shoulder

12. Road District 142

13. BEFORE
GIS
COMPONENT

14. Sustainable Approach vs. Worst First
52%
34%
12%
2%
COUNTY'S THREE-PRONGED SUSTAINABLE APPROACH
Good-Excellent
At Risk
Poor
Failed
42%
41%
15%
2%
WORST FIRST APPROACH (PROJECTED)
Good-Excellent
At Risk
Poor
Failed
Square footage to be treated
Roads rated Good-Excellent
Roads rated Poor & Failed
Overall Network PCI
145MSF 45MSF 100MSF
52% 42%Almost25%increase
14% 17% Almost 20%decrease
71 66 Almost 10% increase
3-Pronged
Sustainable
Approach
Worst First
Approach
(Projected) Δ
100,000 tons of CO2E
reduced

15. 0
10,000,000
20,000,000
30,000,000
40,000,000
50,000,000
60,000,000
FY 09-10 FY 10-11 FY 11-12 FY 12-13 FY 13-14
AREA,SF
FIVE YEAR ROAD PROGRAM
TREATMENT CATEGORIES TO MAINTAIN EXISTING PCI FOR MAJORS AND LOCAL SYSTEM
PREVENTATIVE MAINTENANCE RESURFACE REHABILITATION RECONSTRUCTION
PCI AFTER= 76
TOTAL = 48 MSF
TOTAL = $91M
PCI AFTER= 76 PCI AFTER= 76PCI AFTER= 77PCI AFTER= 77
TOTAL = 30 MSF
TOTAL = $65M
TOTAL = 41 MSF TOTAL= 58.5 MSF
TOTAL = $66M
TOTAL = 39.7 MSF
TOTAL = $68M TOTAL= $57M
LEGEND:

16. 5-Year Work History & Network PCI
32MSF
8.5MSF
12MSF
16.6MSF
8.8MSF
$66M
$15M
$30M
$26M
$19M
76
74
73
72
71
68
69
70
71
72
73
74
75
76
77
-
10
20
30
40
50
60
70
FY 2009/10 FY 2010/11 FY 2011/12 FY 2012/13 FY 2013/14
MillionsSquareFeet(MSF)
Pavement Preservation ($1.0/SF)
Resurface ($2/SF)
Rehab/Recon ($3-5/SF)
Treatment Cost ($)
Weighted Avg. PCI
WeightedAvg.PCI

17. Pavement Management System
Core Principles
 Decisions Based on Quality Information
 Performance Based
 Various Scenarios/Alternatives Evaluated
 Policy Driven
 Clear Accountability